Results 11 to 20 of about 1,064,480 (240)
Weak Gravitational Lensing [PDF]
In this brief review I consider the advances made in weak gravitational lensing over the last 8 years, concentrating on the large scales - cosmic shear. I outline the theoretical developments, observational status, and the challenges which cosmic shear must overcome to realise its full potential. Finally I consider the prospects for probing Dark Energy
Heavens, A, A. Heavens
openaire +6 more sources
Instrumental systematics and weak gravitational lensing [PDF]
We present a pedagogical review of the weak gravitational lensing measurement process and its connection to major scientific questions such as dark matter and dark energy. Then we describe common ways of parametrizing systematic errors and understanding how they affect weak lensing measurements.
Rachel Mandelbaum (3892837)
openaire +3 more sources
Gravitational Lensing: Strong, Weak and Micro [PDF]
The theory, observations, and applications of gravitational lensing constitute one of the most rapidly growing branches of astrophysics. The gravitational deflection of light generated by mass concentrations along a light path produces magnification ...
Peter Schneider +2 more
openaire +2 more sources
Weak gravitational lensing cross-correlations
The matter content of the Universe is dominated by dark matter. Beyond its abundance and its lack of non-gravitational interactions with standard model matter, little is known about the nature of dark matter. This thesis attempts to illuminate different aspects of dark matter by using gravitational lensing in conjunction with other cosmological probes.
Tröster, Tilman
core +3 more sources
Galaxy-Galaxy weak gravitational lensing in cluster environment [PDF]
An investigation was carried out into the phenomenon of galaxy-galaxy weak lensing in a sample of 10 X-ray selected galaxy clusters. Using high resolution Hubble Space Telescope imaging data and mathematical techniques described within, the feasibility ...
James, Timothy, John
core +7 more sources
Gravitational lensing from a spacetime perspective. [PDF]
The theory of gravitational lensing is reviewed from a spacetime perspective, without quasi-Newtonian approximations. More precisely, the review covers all aspects of gravitational lensing where light propagation is described in terms of lightlike ...
Perlick, Volker
core +4 more sources
Weak gravitational lensing of the CMB [PDF]
Weak gravitational lensing has several important effects on the cosmic microwave background (CMB): it changes the CMB power spectra, induces non-Gaussianities, and generates a B-mode polarization signal that is an important source of confusion for the signal from primordial gravitational waves.
Lewis, Antony, Challinor, Anthony
openaire +2 more sources
Weak Gravitational Lensing of Finite Beams [PDF]
The standard theory of weak gravitational lensing relies on the infinitesimal light beam approximation. In this context, images are distorted by convergence and shear, the respective sources of which unphysically depend on the resolution of the distribution of matter---the so-called Ricci-Weyl problem.
Fleury, Pierre +2 more
openaire +5 more sources
Weak gravitational lensing by dark clusters [PDF]
We calculate the abundance of dark-matter concentrations that are sufficiently overdense to produce a detectable weak-gravitational-lensing signal. Most of these overdensities are virialized halos containing identifiable X-ray and/or optical clusters. However, a significant fraction are nonvirialized overdensities still in the process of gravitational ...
Weinberg, Nevin N., Kamionkowski, Marc
openaire +3 more sources
Nulling tomography with weak gravitational lensing [PDF]
We explore several strategies of eliminating (or nulling) the small-scale information in weak lensing convergence power spectrum measurements in order to protect against undesirable effects, for example the effects of baryonic cooling and pressure forces on the distribution of large-scale structures. We selectively throw out the small-scale information
Huterer, Dragan, White, Martin
openaire +2 more sources

